Re: Vacuum Advance, 86spg - Saab 900 Bulletin Board - Saabnet.com
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Re: Vacuum Advance, 86spg
Posted by JohnB (more from JohnB) on Sat, 24 Mar 2001 19:31:34
In Reply to: Vacuum Advance, 86spg, Jhawk, Sat, 24 Mar 2001 16:13:49
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It's kind of irrelevant....the vacuum can should hold vacuum...period.
If it doesn't hold vacuum, it's holed and should be replaced. Do yourself a BIG favor and put in SPG's AID vacuum can...allows advance to 20 degrees initial and smoother/farther pressure retard. On my 87 900T it changed to much smoother high boost (17psi...still hitting overpressure switch because it's cool in the morning) and alluvasudden I'm getting 26mpg commuting mileage and the automatic NEVER got above 22mpg before (with stock 14-16degree initial advance)..
Hesitation or missing is often worn/older plugs or wires...even a Bougicord can fail in a year with bad luck..check them. How about cap and rotor?
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